#public_footer {

    position: fixed;
    left: 0;
    bottom:0;

    width: 100%;
    background-color: #fff;

}
#public_footer ul {
    display: flex;
    justify-content: space-between;
    width: 100%;
    line-height: 80px;
}
#public_footer ul li {
    width: 25%;
    height: 100%;

    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 50px;
    height: 50px;
}
#public_footer ul li img {
    width: 40px;
    height: 40px;
}
